Incinerator



March 27, 1956 K. F. TRIGGS INCINERATOR Filed Dec. 6, 1954 C5 Sheets-Sheet 1 PI-. IL

IN VEN TOR. Ksmvsm f. 77mm flrromvans.

March 27, 1956 K. F. TRIGGS 2,739,547

INCINERATOR Filed Dec. 6, 1954 5 Sheets-Sheet 3 IN VEN TOR.

United States INCENERATOR Kenneth F. Triggs, Huntington, Ind, assignor to The Majestic Company, Inc, Huntington, End, a corporation Application December 6, 1954, Serial No. 473,282

6 Claims. (Cl. 110-48) This invention relates to the construction of a down draft incinerator particularly of the type for installation i n connection with a chimney flue for burning combustible refuse such as trash and garbage.

The feature of the invention resides in the structure of the incinerator wherein an inner liner within an outer casing provides for an up draft leading from the bottom of the casing into a bafiled down draft opening provided by the lid structure for the burning of refuse contained within an open mesh basket mounted therein. Such a structure provides all the advantages and benefits of the presently constructed down draft incinerators, but at a considerable saving in production costs.

A further feature of the invention resides in the mountings for supporting a refuse containing basket within the inner liner and spaced inwardly thereof.

Still a further feature of the invention resides in the grate structure associated with the refuse burning basket to provide a dump grate for initially supporting the burning refuse and readily permitting dumping and removal of the ash.

The full nature of the invention will be understood from the accompanying drawings and the following description and claims:

Fig. l is a central vertical section taken through the flue outlet and front face of the incinerator with the lid in closed position.

Fig. 2 is a section taken on the line 2-2 of Fig. 1 showing the lid in its open position.

Fig. 3 is a plan view of the incinerator with the lid closed.

Fig. 4 is a perspective view of the grate structure with the movable section slid to dumping position.

Fig. 5 is the same as Fig. 4, showing a modified form of grate structure.

In the drawings there is shown an incinerator having an outer casing of rectangular cross section which is supported upon an inset base 11 for elevation from the ground. The front wall of the casing is provided with an ash removing opening in which a removable closure 12 is adapted to fit and be locked in closed position by engaging a bracket 13 over a ledge 14 formed on the bottom 15 of the casing.

Mounted inwardly of the rear and side Walls of the casing in spaced relation thereto there are flue defining liners 16 to provide an up draft space connecting with the open bottom thereof provided by inset base 11. Secured to the bottom portion of the liners 16 there are basket and grate supporting brackets 17 upon which an open mesh refuse containing basket 18 rests. Said basket is suspended from the top of the casing by the hooks 19, said hooks being secured to a top liner 20 which in turn is carried and secured to the casing 13 to extend over the liners l6. Said top liner is formed with a rectangular opening 22 positioned centrally of the basket and aligned with the top opening 22 in the top panel 23 of the casing ice through which access may be had to the basket for dumping refuse therein.

Communicating with the interior of the casing and liners in, including the basket receiving space therein, there is provided a flue outlet having an upstanding collar 24. Forwardly of the flue outlet there is a downwardly and rearwardly extending baffle plate 25 positioned between the side walls of the casing and secured thereto by the flanges 26 which carry the basket retaining hooks 27, said bracket and bafile plate being spaced slightly below the top liner 20 to provide a passage to the flue outlet.

The top panel 23 carries a closure lid 28 having a handle 2?, said lid including a flanged closure plate 30 adapted to engage and seat upon the top panel 23 when in closed position. The lid is pivotally carried by rigid hinge straps 31 curved to operate through the top opening 22 to be hingedly secured at 32 to the underside portion of the top panel, as shown in Fig. 2. The closure plate 34) carries an annular baffle plate 33 mounted in spaced relation thereto by the straps 34. When said lid is swung to open position, as shown in Fig. 2, refuse may bereadily dumped into the basket 1%. When the lid is in its closed position, as shown in Fig. 1, it will seal off and prevent any down draft through the top of the incinerator, but will cause the flue outlet to draw air into and centrally of the top of the basket and downwardly therethrough to its lower position for developing a down draft therein for combustion of the refuse. Thus, the air will be drawn upwardly about the flue defining liners it: in the direction of the arrows and about the collar of the flue tightly into the space between the closure 34D and baflle plate 33 in the lid 28 and then downward through the basket, there being a limited escapeof draft air through the opening above the baflle 25.

Supported upon the bracket 17 together with the wire basket there is a dump grate structure'which is surrounded by the basket and forms the bottom portion thereof. Said dump grate may comprise a grate structure including the usual frame and spaced bars arranged with spaced side portions 35 which extend horizontally in the plane of the bottom of the basket. Said side portions carry spaced depending tracks 36 formed integrally with a central wedge-shaped fixed grate section 37 extending over the forward portion of the space between the side portions. Conforming in shape to the fixed grate 3'7 and slidably mounted upon the tracks 36 to nest thereunder, there is a movable grate section Connected with said movable section and extending through the front liner 16a is a dump bar 39 having a handle all). Thus, through the manipulation of the dump bar upon removal of the door 12, the movable grate section 33 may he slid on the track 35 forwardly under and in nesting relation with the fixed grate section 37 to permit ashes to drop or be pushed through the opening in the grate left by the forward movement of said section. The ashes are then dumped into the removable ash pan 41 slidably mounted on the bottom 15 through the medium of the handle 42. For deflecting any ashes passing through the side portions of the grate there is a pair of oppositely disposed inwardly and downwardly extending deflector plates d3 secured to the flue liners 16.

The grate structure of Figs. 1 and 2 is illustrated in perspective in Fig. 4, showing the movable grate section 38 completely removed from the grate structure. in the modified form of grate structure shown in Fig. 5 the side portions are formed to slope downwardly from the brackets 17, terminating in the fixed grate bars 137, said bars extending between a pair of spaced track bars 136 upon which the movable grate section 138 is adapted to slide between grate closing and grate dumping positions.

In both Figs. 4 and 5 the movable grate section is usually not removable, but is slid into nesting relation under or over the fixed grate section for ash dumping. Whereas two forms of dump grates are herein illustrated, they may take various forms, including a coplanar structure, it being the purpose to provide a forward fixed grate section having a nesting movable grate section slid able thereon under the fixed grate section for opening up a portion of the grate to facilitate the cleaning of ashes and debris therefrom.

The incinerator herein disclosed may be fuelless or gas or oil fired. By Way of illustration there is shown at 44 the representation of a gas burner or nozzle for igniting the refuse by a gas flame. A similar installation of an oil burner flame may be incorporated in place thereof. However, in many instances the incinerator is fired by the burning of its own refuse and is therefore fuelless.

The invention claimed is:

1. A down draft incinerator comprising a casing having an opening at the top to receive buruable refuse, an inner liner spaced from the interior walls of said casing and secured thereto, a supporting base for said casing extending downwardly and inwardly therefrom to permit air to be drawn upwardly between said casing and liner, a top closure for said opening hinged to the top of said casing having a baffle spaced inwardly thereof and open to the space between said casing and liner to direct the air downwardly, an open mesh refuse receiving basket within said liner and spaced inwardly thereof, a bottom supporting bracket and top suspending hooks secured to said liner for mounting said basket therein, a flue communicating with the interior of said liner positioned to one side of said basket and top closure to draw air from the lower portion of said basket, and a dump grate mounted on said bracket within said basket to provide a bottom therefor, said grate having a fixed section and a movable section slidable under said fixed section for dumping burned refuse.

2. A down draft incinerator comprising a casing having an opening at the top to receive burnable refuse, an inner liner spaced from the inner walls of said casing and secured thereto, means for supporting said casing and liner to provide an air intake into the lower portion of the space therebetween, an open mesh refuse receiving basket within said liner and spaced inwardly thereof, a top closure for said opening hinged to the top of said casing having a baflie spaced inwardly thereof and open to the top of said basket, means for mounting said basket within said casing and liner, a flue connected with the interior of said liner positioned to one side of said basket and top closure to draw air from the lower portion of said basket, means for mounting said basket within said casing and liner, a flue connected with the interior of said liner positioned to one side of said basket and top closure to draw air from the lower portion of said basket, and a dump grate associated with the bottom of said basket having a fixed section and a movable section slidable relative thereto for opening and closing a dump opening in said grate.

3. A down draft incinerator comprising a casing having an opening at the top to receive burnable refuse, an inner liner spaced from the interior walls of said casing and secured thereto, the space between said casing and liner being open to the atmosphere at the lower portion thereof, an open mesh refuse receiving basket supported within said liner and spaced inwardly thereof for receiving refuse through said opening, a top closure for said opening hinged to the top of said casing having a depending bafiie spaced inwardly thereof and open to the space between said casing and liner to direct air from said space downwardly through said basket, a flue communicating with the interior of said liner positioned to one side of said basket and top closure to draw air from the lower portion of said basket, and a dump grate mounted within said liner at the bottom of said basket having a fixed section and a movable section slidable relative thereto from refuse supporting position to ash dumping position.

4. A down draft incinerator comprising a casing having an opening at the top to receive burnable refuse, an inner liner spaced from the interior walls of said casing and secured thereto, the space between said casing and liner being open to the atmosphere at the lower portion thereof, an openmesh refuse receiving basket supported within said liner and spaced inwardly thereof for receiving refuse through said opening, a top closure for said opening, a flue communicating with the interior of said liner positioned to one side of said basket and top closure to draw air from the lower portion of said basket, a dump grate mounted at the lower end of said basket, said dump grate including a rigid section having horizontal wing portions and an intermediate upwardly sloping portion, longitudinally spaced tracks formed integral with and depending from said rigid section, and a slidable grate section slidably movable on said tracks from grate closing position to grate dumping position.

5'. A down draft incinerator comprising a casing having an opening at the top to receive burnable refuse, an inner liner spaced from the interior walls of said casing and secured thereto, the space between said casing and liner being open to the atmosphere at the lower portion thereof, an open mesh refuse receiving basket supported within said liner and spaced inwardly thereof for receiving refuse through said opening, a top closure for said opening, a flue communicating with the interior of said liner positioned to one side of said basket and top closure to draw air from the lower portion of said basket, dump grate mounted at the bottom of said basket, said dump grate having a rigid section formed with a dump opening therein, and a movable dump grate section slidably mounted on said fixed grate section to close said dump opening when in one position and slidable under a portion of said fixed grate section to expose said dump opening for refuse dumping therethrough.

6. A down draft incinerator comprising an outer casing having an opening at the top to receive burnablc refuse, an inner liner spaced from the interior walls of said casing and secured thereto, a supporting base for said casing extending downwardly and inwardly therefrom to permit air to be drawn upwardly between said casing and liner, an open mesh refuse receivable basket within said liner and spaced inwardly thereof, basket suspending hooks secured to said liner for suspending said basket therein, a top closure for said opening hinged to the top of said casing having a bathe spaced inwardly and downwardly therefrom with central and peripheral openings therein to permit air drawn upwardly between said casing and liner to be directed downwardly into said basket, a flue communicating with the interior of said liner positioned to one side of said basket and baffled from the upper portion thereof for drawing air from the lower portion of said basket, a bottom supporting bracket secured to said liner for supporting the lower end of said basket, and a dump grate mounted on said bracket within said basket to provide a bottom therefor, said grate having a fixed section and a movable section slidable under said fixed section for opening a portion of said grate to the dumping of burned refuse.

References Cited in the tile of this patent UNITED STATES PATENTS 

